#include <stdint.h>
#include "rand48.h"

uint64_t __rand48_step(unsigned short *xi, unsigned short *lc)
{
    uint64_t a, x;
    x = xi[0] | xi[1]+0U<<16 | xi[2]+0ULL<<32;
    a = lc[0] | lc[1]+0U<<16 | lc[2]+0ULL<<32;
    x = a*x + lc[3];
    xi[0] = x;
    xi[1] = x>>16;
    xi[2] = x>>32;
    return x & 0xffffffffffffull;
}
